Acer 4120 No audio is heard from the computer, Keyboard does not respond, Printer does not work

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No audio is heard from the computer.

Check the following:

The volume may be muted. In Windows, look at the volume control (speaker) icon on the taskbar. If it is crossed-out, click on the icon and deselect the Mute all option.

The volume level may be too low. In Windows, look at the volume control icon on the taskbar. You can also use the volume control buttons to adjust the volume. See "Hotkeys" on page 32 for more detail.

If headphones, earphones or external speakers are connected to the line- out port on the computer, the internal speakers automatically turn off.

I want to eject the optical drive tray without turning on the power.

There is a mechanical eject hole on the optical drive. Simply insert the tip of a pen or paperclip into the hole and push to eject the tray. (If your computer's optical drive is a slot-load model, it will not have an eject hole.)

The keyboard does not respond.

Try attaching an external keyboard to a USB port on the computer. If it works, contact your dealer or an authorized service center as the internal keyboard cable may be loose.

The infrared port does not work.

Check the following:

Make sure that the infrared ports of the two devices are facing each other (+/- 15 degrees) a maximum of 1 meter apart.

Make sure there is a clear path between the two infrared ports. Nothing should be blocking the ports.

Make sure you have the appropriate software running on both devices (for file transfers) or you have the appropriate drivers (for printing to an infrared printer).

During the POST, press <F2> to access the BIOS utility and verify that the infrared port is enabled.

Make sure both devices are IrDA-compliant.

The printer does not work.

English

Check the following:

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Contents Users Guide Extensa 4420/4120 SeriesPage Information for your safety and comfort Safety instructionsTurning the product off before cleaning Using electrical power Product servicing Guidelines for safe battery usagePotentially explosive environments Replacing the battery packMedical devices Additional safety informationTelephone line safety Operating environmentPotentially explosive environments VehiclesMercury advisory Emergency calls Disposal instructionsTips and information for comfortable use Taking care of your vision Finding your comfort zoneDeveloping good work habits Turning your computer on and off Basic care and tips for using your computerFirst things first Your guidesTaking care of your AC adapter Taking care of your computerTaking care of your battery pack Cleaning and servicingPlease refer to Frequently asked questions on Xvi Contents Using a computer security lock Audio Acer eRecovery Management Page Empowering Technology password Acer Empowering TechnologyAcer eNet Management Empowering Technology To switch between power plans Acer ePower ManagementUsing power plans To create a new power planBattery status To delete a power planAcer ePresentation Management Acer eDataSecurity Management for selected models Acer eLock Management Empowering Technology Acer eRecovery Management Empowering Technology Acer eSettings Management Windows Mobility Center for Windows Vista only Empowering Technology Your Acer notebook tour Front viewDescription Launch buttons on page 26 for more details Easy-launch buttons on page 26 for more detailsIcon Description Closed front view# Icon Description Left viewRear view Right viewBase view Specifications English English English Icon Function Description IndicatorsEasy-launch buttons Icon Easy-launch button Default applicationIcon Productivity key Default application Touchpad basics TouchpadFunction Left Right Main touchpad Center button Button Lock key Description Using the keyboardDesired access Num Lock on Num Lock off Lock keys and embedded numeric keypadKeyDescription Windows keysHotkeys Fn + ← Hotkey Icon Function Description Fn + ↑Fn + ↓ Fn + →Euro symbol Special keysUS dollar sign Ejecting the optical CD or DVD drive tray Using a computer security lock Audio Adjusting the volumeAcer GridVista dual-display compatible Using the system utilitiesLaunch Manager Norton Internet Security How do I check for viruses?Select Tasks & Scans NTI Shadow Frequently asked questions Nothing appears on the screenImage is not full-screen Printer does not work No audio is heard from the computerKeyboard does not respond Infrared port does not workWant to set up my location to use the internal modem Requesting service International Travelers Warranty ITWBefore you call Battery pack Battery pack characteristicsMaximizing the batterys life Installing and removing the battery pack Charging the battery Checking the battery levelOptimising battery life Situation Recommended Action Battery-low warningPreparing the computer Disconnecting from the desktopTaking your notebook PC with you Moving aroundTaking the computer home What to bring to meetingsWhat to take with you Setting up a home office Traveling with the computerSpecial considerations What to bring with you Traveling internationally with the computerUsing a computer security lock Using passwordsSecuring your computer Setting passwords Entering passwordsExpanding through options Connectivity optionsFax/data modem Fast Infrared FIR Built-in network featureIeee 1394 port Universal Serial Bus USBPC Card slot Inserting a PC CardEjecting a PC Card Bios utility Boot sequenceInstalling memory Playing DVD movies Enable disk-to-disk recoveryPassword Using softwareCreate backup Acer eRecovery ManagementRestore and recovery Burn backup discTroubleshooting tips Error messagesError messages Corrective action English Regulations and safety notices FCC noticeOperation conditions Modem notices Remarque à lintention des utilisateurs canadiensDeclaration of Conformity for EU countries List of applicable countries TBREnglish Laser compliance statement LCD pixel statementMacrovision copyright protection notice Article 3.1b EMC Article 3.1a Health and SafetyRadio device regulatory notice General European Union EUEnglish FCC RF safety requirement English LCD panel ergonomic specifications USA EN60950-12001 EN600652002 applied to models with TV function Acer Computer Shanghai LimitedIndex English